package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DataOverViewQueryDTO;
import com.sky.dto.DishDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增菜品和对应的口味数据
     * @param dishDTO
     */

    @Transactional
    public void saveWithFlavors(DishDTO dishDTO) {

        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入1条数据
        dishMapper.insert(dish);
        //获取插入后的id
        Long dishId = dish.getId();


        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0){
            for (DishFlavor flavor : flavors) {
                flavor.setDishId(dishId);
            }
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DataOverViewQueryDTO dishPageQueryDTO) {
        PageHelper.startPage((Integer) dishPageQueryDTO.getPage(), (Integer) dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断菜品状态，起售中的菜品不能删除
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断菜品是否关联了套餐，如果关联了套餐，则无法删除
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishId(ids);
        if(setmealIds != null && setmealIds.size() > 0){
            //当前菜品有套餐关联，无法删除
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品表中的数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deleteByDishId(id);
//        }



        //根据菜品id集合批量删除数据
        //sql delete from dish where id in (?,?,?)
        dishMapper.deleteById(ids);


        //删除关联的口味数据
        //sql: delete from dish_flavor where dish_id in (?,?,?)
        dishFlavorMapper.deleteByDishId(ids);
    }

    @Override
    public DishVO getByIdwithFlavors(Long id) {
        return null;
    }

    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
      // 查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //将菜品数据封装到DishVO中
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;

    }

    /**
     * 修改菜品
     * @param dishDTO
     */

    public void updateWithFlavor(DishDTO dishDTO) {
     Dish dish = new Dish();
     BeanUtils.copyProperties(dishDTO,dish);
        // 修改菜品表
        dishMapper.update(dish);

       //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(Collections.singletonList(dishDTO.getId()));

       //插入新的口味数据
       List<DishFlavor> flavors = dishDTO.getFlavors();
       if(flavors != null && flavors.size() > 0){
           for (DishFlavor flavor : flavors) {
               flavor.setDishId(dishDTO.getId());
           }
           //向口味表批量插入
           dishFlavorMapper.insertBatch(flavors);
       }

    }
    public List<Dish> list (Long categoryId){
        Dish dish=Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        return dishMapper.list(dish);
    }


    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
